are a wonderful way to exhibit
Newton’s Laws of motion.
The Forces are with you
object in a state of uniform motion tends to remain in that
state of motion unless an external force
is applied to it.
In this case the trampoline is the external force and the jumper
is the external force on the trampoline.
relationship between an object's mass m, its
acceleration a, and the applied force F
is F = ma. Acceleration and
force are vectors (as indicated by their
symbols being displayed in slant bold font); in this law the
direction of the force vector is the same as the direction of
the acceleration vector.
If the boy was sitting on the trampoline with his buddies then
forces would be balanced and they would all be at equilibrium as
long as none of them moved at all.
III. For every action there is an equal and opposite reaction.
Jump on a trampoline and you will see that this is true.